Reduce starting compression with easy-install manual release valves. Drill and tap each cylinder head 10 mm x 1.0 mm. Fits all Big Twin models.
+34 636 847 491 (10:00 - 13:30)
Active filters
JIMS
Manual Compression Release Valves — Primary starter, Pair, Silver
€121.23
Regular price
€152.40
€36.69
Regular price
€46.13
JIMS
Oil Pump Component — Idler gear, 26317-68A
Replacement component for Big Twin models; precision-machined to restore lubrication performance and reduce noise.
€49.89
Regular price
€62.71
JIMS
Oil Pump Component — JIMS idler gear
Replacement component for Big Twin lubrication systems. Precision‑machined for durability and proper fit.
€54.52
Regular price
€68.54
JIMS
Gear-Side Pinion Shaft Nut — 5/8-24
High-strength pinion shaft nut designed for secure gear-side installation and long service life.
€28.92
Regular price
€36.36
JIMS
Valve Lock Keys — 8-pack
Precision-made valve lock keys with a 10° lock angle. Heat-treated and made in the U.S.A. Designed for reliable valve keeper service.
€25.19
Regular price
€31.67
EASTERN MOTORCYCLE PARTS
Piston Pin Clips — 10 Pack, A-22589-83A
Durable piston pin clips for a wide range of Harley models. Meets or exceeds OEM specs. Made in the USA.
€3.63
Regular price
€4.91
EASTERN MOTORCYCLE PARTS
Piston Pin Clips — 10 Pack, Piston
High-quality retaining rings that meet or exceed OEM standards. Made in the U.S.A.
€5.72
Regular price
€7.74